灾害 zāihài HSK5 disaster Origin Definitions Defs Strokes Stroke Words Sentences Sents 自然灾害 zìránzāihài natural disaster 次生灾害 cìshēngzāihài secondary disaster secondary disaster (e.g. epidemic following floods)灾害链 zāihàiliàn disaster chain A series or sequence of calamities where one disaster triggers another in a chain reaction.